Java InputStream Copy copyLarge(InputStream input, OutputStream output)

Description

Copy bytes from a large (over 2GB) InputStream to an OutputStream.

License

Apache License

Parameter

Parameter	Description
input	the <code>InputStream</code> to read from
output	the <code>OutputStream</code> to write to

Exception

Parameter	Description
NullPointerException	if the input or output is null
IOException	if an I/O error occurs

Return

the number of bytes copied

Declaration

public static long copyLarge(InputStream input, OutputStream output) throws IOException 

Method Source Code

//package com.java2s;
//License from project: Apache License 

import java.io.IOException;
import java.io.InputStream;

import java.io.OutputStream;
import java.io.Reader;

import java.io.Writer;

public class Main {
    /**/* w  w w .  j  ava2  s  .c o m*/
     * Default buffer size for writing files.
     */
    private static final int DEFAULT_BUFFER_SIZE = 1024 * 4;

    /**
     * Copy bytes from a large (over 2GB)
     * <code>InputStream</code> to an
     * <code>OutputStream</code>.
     * <p>
     * This method buffers the input internally, so there is no need to use a
     * <code>BufferedInputStream</code>.
     *
     * @param input the <code>InputStream</code> to read from
     * @param output the <code>OutputStream</code> to write to
     * @return the number of bytes copied
     * @throws NullPointerException if the input or output is null
     * @throws IOException if an I/O error occurs
     * @since Commons IO 1.3
     */
    public static long copyLarge(InputStream input, OutputStream output) throws IOException {
        byte[] buffer = new byte[DEFAULT_BUFFER_SIZE];
        long count = 0;
        int n = 0;
        while (-1 != (n = input.read(buffer))) {
            output.write(buffer, 0, n);
            count += n;
        }
        return count;
    }

    /**
     * Copy chars from a large (over 2GB)
     * <code>Reader</code> to a
     * <code>Writer</code>.
     * <p>
     * This method buffers the input internally, so there is no need to use a
     * <code>BufferedReader</code>.
     *
     * @param input the <code>Reader</code> to read from
     * @param output the <code>Writer</code> to write to
     * @return the number of characters copied
     * @throws NullPointerException if the input or output is null
     * @throws IOException if an I/O error occurs
     * @since Commons IO 1.3
     */
    public static long copyLarge(Reader input, Writer output) throws IOException {
        char[] buffer = new char[DEFAULT_BUFFER_SIZE];
        long count = 0;
        int n = 0;
        while (-1 != (n = input.read(buffer))) {
            output.write(buffer, 0, n);
            count += n;
        }
        return count;
    }
}

Related

1. copyLarge(InputStream input, OutputStream output)
2. copyLarge(InputStream input, OutputStream output)
3. copyLarge(InputStream input, OutputStream output)
4. copyLarge(InputStream input, OutputStream output)
5. copyLarge(InputStream input, OutputStream output)
6. copyLarge(InputStream input, OutputStream output)
7. copyLarge(InputStream input, OutputStream output)
8. copyLarge(InputStream input, OutputStream output, byte[] buffer)
9. copyLarge(InputStream input, OutputStream output, byte[] buffer)